421388843 has 4 divisors (see below), whose sum is σ = 446176440. Its totient is φ = 396601248.

The previous prime is 421388833. The next prime is 421388873. The reversal of 421388843 is 348883124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421388843 - 2¹⁴ = 421372459 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421388843.

It is not an unprimeable number, because it can be changed into a prime (421388833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12393773 + ... + 12393806.

It is an arithmetic number, because the mean of its divisors is an integer number (111544110).

Almost surely, 2^421388843 is an apocalyptic number.

421388843 is a deficient number, since it is larger than the sum of its proper divisors (24787597).

421388843 is a wasteful number, since it uses less digits than its factorization.

421388843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24787596.

The product of its digits is 147456, while the sum is 41.

The square root of 421388843 is about 20527.7578658752. The cubic root of 421388843 is about 749.7117962286.

The spelling of 421388843 in words is "four hundred twenty-one million, three hundred eighty-eight thousand, eight hundred forty-three".